Abstract: The present invention features a method of treating at least one sign of aging on the skin selected from the group consisting of enhancing the elasticity of said skin, enhancing the firmness of said skin, and reducing the appearance of wrinkles or cellulite on the skin, by administering to skin in need of such treatment a composition comprising at least one compound of the formula I or formula II: wherein R1, R2, R3, R4, and R5 independently, are selected from the group consisting of hydrogen, C1-C6 alkyl, C1-C6 hydroxyalkyl, or a cosmetically acceptable salt thereof.

Abstract: The present invention features a method of treating at least one sign of aging on the skin selected from the group consisting of enhancing the elasticity of said skin, enhancing the firmness of said skin, and reducing the appearance of wrinkles or cellulite on the skin, by administering to skin in need of such treatment a composition comprising at least one compound of the formula I or formula II: wherein R1, R2, R3, R4, and R5 independently, are selected from the group consisting of hydrogen, C1-C6 alkyl, C1-C6 hydroxyalkyl, or a cosmetically acceptable salt thereof.

Abstract: The present invention relates to treatment of the skin and, more particularly, to the application of light to the skin, followed by the optical application of a benefit agent to said skin.

Abstract: Methods of mitigating acne include exposing an expanse of skin to light; terminating the exposure of the skin to the light; and applying a benefit agent to the expanse of skin after a delay following the termination. The light exposure may be for a period of less than about one hour, and the light may be suitable for either (a) exciting porphyrins associated with the expanse of skin into an energetic state suitable for destroying acne-causing micro-organisms, or (b) for heating lipids present in sebaceous glands within the expanse of skin in order to modulate the flow of sebum in said sebaceous glands, or (c) for reducing inflammation.